Bed-plate for beating-engines.



F. H. EITHER & W. J. CRANDALL.

BED PLATE EOE BEA'I'ING ENGINES.

APPLICATION I'ILED HOV. 28/1907.

Patented 1390,22, 1908.

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P. H. EITHER a; w. J. GRANDALL.

BED PLATE FOR BBATING ENGINES.

APPLICATION rum) NOV.23,1907.

Patented Dec. 22, 1908.

2 SHEETSSHEET 2.

' avweniou M M. m, J (influx L FRED H. EITHER AND WILMER J. GRANDALL, OF'NILES, MICHIGAN.

BED-PLATE FOR BEATING-ENGINES.

Specification of Letters Iatent.

Patented Dec. 22, 1908.

Application filed November 23, 1907. Serial No. 403,496.

To all whom it may concern:

Be it known that we, FRED H. EITHER and WILMER J. CRANDALL, citizens ofthe United States, residing at Niles, in the county of Berrien and.State of Michigan, have invented certain new and useful Improvements inBed-Plates for Beating-Engines, of which the following is aspecification.

The present invention consists in improvements in pulp making machines,and has special relation to the cutter plates used in connection withwhat is known as beating engines in which a novel form of mounting forthe knives is provided to permit of various degrees of adjustmentthereof, and also to provide a ready means for the replacement of any ofthe knives by a new one should any of them become damaged.

Another important object of the invention is in the manner in which theknives are arranged relatively to the drum, whereby a shearing effect ishad upon the knives to make them self-sharpening.

With the above and many other objects in View, the inventioncontemplates the pro vision of a casing in which is mounted two membersof a cooperating adjusting device, a supporting base for the knivesmounted in said casing above said adjustin members and being providedwith a pl urality of knive-receiving slots, and a plurality of knivesadapted to extend through said slots and have their lower portionsresting on said adjusting members. i

The mechanism involved in the present invention for accomplishing theabove objects is susceptible of many and various modifications, but apreferred embodiment thereof is shown in the accompanying drawings,wherein- Figure 1 is a longitudinal sectional View of a cutter retainingcasing showing the application of the present invention. Fig. 2 is across section view, showing the invention as in use beneath a beatingdrum, and serving to illustrate the shearin effect the blades of thedrum and knives of the cutter plate have upon one another. Fig. 3 is aside elevation of the casing, showing the cutting edges of the knivesprojecting beyond the top plane thereof, and also indicating in dottedlines the arrangement of the adjusting wedges. Fig. 4 is a plan view ofthe cutter plate showing the arrangement of the knives carried thereby.Fig.

5 is a perspective view of the casing. Fig. i 6 is a similar view of theadjusting wedges.

Referring to said drawings, wherein like characters of referencedesignate corresponding parts, 1 designates a casing for the entiremechanism, which is of rectangular shape and consists of a bottom 2,sides 3--3, and ends 4. The ends are of less height than the sides andare so arranged that their outer sides will be substantially flush withthe outer edges of said sides.

The two side members 33' of the casing each carry on their interiorsurfaces a member 5, which are of the same width as the ends of thecasing, and which may be cast integral therewith, to provide an interiorframe the sides of which are inclosed by the outer sides 3-3 of thecasing. This arrangement of interior frame provides a suporting ledge 6,the function of which will be presently explained.

Within the casing 1, and resting on the bottom thereof is a knifeadjusting mechanism comprising two wedges 7 and 8, which are mounted oneupon the other and each of which have their contacting face providedwith steps 9-10, forming inclined bearing surfaces 11-12, and stops 1112which permits of said members, when in their normal, or unadjustedposition, to lie in a closely nested condition, as shown in Fig. 1 ofthe drawings. The lower member 7 is of a size to allow of its beingsnugly fitted within the casing, and when in its operative position isheld stationary therein. The upper member 8 may be moved longitudinallyon said lower member by means of an adjusting screw 13 which passesthrough one end of the casing and engages with the end of said member 8.

A cutter plate 14: is seated upon the supporting ledge 6 within thecasing, and is held in such position by means of the fastening screws 15which pass through the sides of the casing and engage with the edgesthereof. Said cutter plate has formed therein two series of knife slots1617, which are arranged at different angles, and are of a size topermit of the knives 18 being passed therethrough. As shown more clearlyin. Fig. 1 of the drawings, the knives 18, when in their operativeposition, have their lower ends resting on and supported by the topsurface of the adjusting wedge member 8, and their upper cutting edgesprojected beyond the plane of the top "surface of the cutter plate.

In Fig. 2 of the drawings a conventional form of beating drum 19 hasbeen shown, comprising a drum proper carrying the projecting radialblades 20.

From the foregoing description it will be understood that by turning theadjusting screw in one direction will impart a longitudinal movement tothe upper Wedge memher 8, causing its inclined horizontal steppedportion to ride up the similarly formed portion of the lower wedgemember 7. This movement results in a vertical movement of the kniveswithin their slots to bring their cutting edges closer to the blades ofthe beating drum. An opposite movement of the screw retracts the wedgemember 8, and results in lowering the cutting edges of the knives. Eachof said movements of the member 8 is limited, the rising one by means ofits end abutting against the end of the easing, and the loweringmovement by means of the stops 11 and 12 abutting.

To permit of the knives being freely adjustable by the movements of thewedge member 8, their slots are formed slightly larger than the knives.This also allows of the knives being readily removed and replaced by newones when such change is necessary or desirable.

As shown more clearly in Fig. 4 of the drawings, the knives are arrangedin two series in the cutter plate, and extend diago nally across theintermediate portion thereof, and each series extend in oppositediagonals. This arrangement causes the revolving blades of the beatingdrum to have a shearing engagement with each series of knives, whichresults in a sharpening of the knives.

Claim A bed plate for beating engines comprising a casing, internal sidepieces forming supporting ledges, a cutter plate resting on said ledges,and provided with diagonally arranged slots, said slots being arrangedin a plurality of series of different angles of in clination, knivesmounted in said slots, and means for adjusting said knives, saidadjusting means being located below said cutter plate and between saidside pieces.

In testimony whereof we aflix our signatures, in presence of twowitnesses.

FRED H. EITHER.

WILMER J. CRANDALL.

lVitnesses 1 J. DU SHANE, A. L. DU SHANE.

